Rolling-in machine



Sept. 28, 1954 s- LESK|EW|CZ ET Al.

ROLLING-IN MACHINE 2 Sheets-Sheet l Filed June 10, 1949 Sept. 28, 1954 s. LEsKlEwlcz ET Al- 2,690,204

ROLLING-IN MACHINE Filed June 1 0. 1949 2 Sheets-Sheet 2 Patented Sept. 28, 1954 UNITED YSTAT OFFICE ROLLING-IN MACHHNE Application June lt, 31949, Serial No. 98,324

(Cl. 15S- 29) 4 Claims.

This invention relates to a rolling-in machine for use in shaping metal stock, particularly such as shoe dies, paper and leather cutting dies, millinery dies and the like. By way of illustration, in the shoe industry, dies are commonly used for cutting out shoe parts, such as soles, innersoles, uppers, Vamps, quarters and the like. These shoe parts are commonly cut by dies of varying size and height, shaped to make the proper cut, such as so-ealled clicker dies, handle dies, and walker dies. A walker die is a heavy die, normally made from heavy hot-rolled steel from about ,e to le inches thick, and from 1 inch to 6 inches in height, and is used for cutting out heavy or thick pieces of leather, rubber, and other oomposition materials, such as are used in making outer soles for shoes. These heavy walker dies at the present time are made by hand forging, whereby a blacksmith heats the die stock in a forge to red heat and forms the die by bending the die stock to proper shape over an anvil with a hammer. After being thus formed to the shape of a shoe sole, the cutting or top edge of the walker die, is again heated red hot, and is then by hammer and anvil bent in slightly (about le inches) so as to taper downwardly from the top edge, with the result that the lower part of the die is slightly larger than at the top edge, and thus clearance is provided for the shoe pieces to be pushed out of the die by the pressure of 'those beneath. It will be understood that in cutting the die is used by placing it with its cutting edge down on a section of leather hide, or other shoe sole material, in a machine which then presses the die to out through the material beneath. This operation of making the die by the handforging method, takes from 1/2 to 1%, hours labor by a skilled blacksmith, and is relatively costly.

We have accordingly devised the machine herein disclosed for performing this rolling-in process on the top edge of the walker die to provide the necessary clearance for the shoe pieces. The problems involved in our machine were many, and included providing proper means for moving the gripping rolls and rolling-in rolls toward and away from each other in an even, uniform mo tion, and providing proper means for moving the die around between the rolling-in rolls. By the use of our machine, the rolling-in process can be performed in two minutes or less, after the 2 top edge of the die has been heated to red or white heat, and does not require skilled labor. Great savings can thus be made in the cost of making such walker dies, for instance, by the use of our rolling-in machine.

Briefiy, our machine comprises a suitable frame, a fiat horizontal bed on which the heated die is placed during the rolling-in operation., a pair of geared gripping rolls for advancing the dies between the forming rolls, clutch means for moving the gears driving the gripping rolls into and out of driving relation, and means controlled by the operator for moving the forming rolls into and out of rolling relation with the die, or other workpiece.

Before explaining in detail the present invention it is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illusn trated in the accompanying drawings, since the invention is capable of other embodiments and or being practiced or carried out in various ways. Also it is to be understood that the phraseology or terminology employed herein is for the purposes of description and not of limitation, and it is not intended to limit the invention claimed herein beyond the requirements of the prior art.

In the drawings:

Fig. 1 is a plan View of our machine;

Fig. 2 is a vertical section on line 2--2 of Fig. l;

Fig. 3 is a front elevation as viewed from the right in Fig. 1;

Figs. 4 and 5 are perspective views of a piece of die stock, before and after the rolling-in operation, respectively.

In the drawings l@ represents the `frame of our machine generally, and supported thereon is a dat, horizontal plate l2 which forms the bed of the machine, and which normally supports the heated die lil. But it will be understood that other means for supporting the die may be provided, and a portable grill having spaced rods or strips (not shown) may be placed on bed i2 to support dies or other work oi.' varying height, if so desired. Suitable means for cooling the plate i2 is provided, such as heat dissipating fins or water tank (not shown). A suitable source of power such as an electric motor (not shown) is provided for driving the machine, through sprocket chain l5, sprocket wheel I6 mounted on horizontal shaft I1, which carries on its inner end bevel gear I8. Bevel gear I8 in turn meshes with bevel gear I9 mounted on vertical shaft 2B, in bracket 2| attached to the frame I0. Mounted on the upper end of vertical shaft 2li is gear 22, which in turn meshes with gear 23 mounted on vertical shaft 24 also journalled in bracket 2I. The upper end of vertical shaft 2:1 extends through the floor of horizontal bed I2 and carries on its upper end flxedly mounted thereon the knurled gripping roll 25 and on the upper end of the latter and forming an integral part thereof is the forming tool 25. it will be noted that the mechanism thus far mentioned is mounted in xed relation with respect to the horizontal bed I2 and frame I0 of the machine.

At the left side of horizontal bed I2 (Figs. I and 2) a portion is cut out which is lled by movable bed I2a. slidably mounted with respect to horizontal bed I2 for reciprocal horizontal movement therein in the same plane. Extending outwardly from the rear side of movable bed IZU. is the forked arm 2B carrying the horizontal pin 2Q, which forms a pivotal connection with the slotted upper end 3l of lever 3G. Lever S (as shown in Fig. 2) is pivotally mounted on horizontal shaft 32 carried on forked bracket 33 in turn mounted on the side of frame Ill. The slotted lower end Sli of shaft 3! is loosely mounted on horizontal pin 35 in turn carried by arm 36 of a double acting hydraulic cylinder 38. l-lydraulic cylinder 38 in turn is connected by suitable tubing is to pump 4Q controlled by foot pedal 4I (Fig. 3). It will be understood that arm 3S of hydraulic cylinder S8 is moved inwardly and outwardly as controlled by the operator through foot pedal 4I. As hydraulic cylinder St is of standard construction it need not be described in detail.

Fixedly mounted on the underside of movable bed. ma as by bolts 43 is the bracket 44 which carries on its outer end vertical shaft 45. Fixedly mounted on shaft e is gear IG which meshes with gear il?, in turn mounted on vertical shaft 4B supported on the outer end of bracket 4t (Fig. 1).

A second knurled gripping roll 5B again is mounted in vertical extension of shaft l5 and as an integral part thereof.

Mounted on the top of horizontal bed I2 and spanning movable bed IZa are vertical supports which are bolted to bed I2 by means of bolts In the top inside portion of supports 55 horizontal grooves '5l are provided in which slide 58 is mounted for horizontal reciprocal movement. The leading and inner end of slide 58 carries a vertical shaft 59 on which is rotatably mounted at its lower end a second forming roll 6D mounted in engaging and complementary relation to the first forming roll and directly over vertical shaft Q5 and second knurled gripping roll 50. Supports 55 are connected at their rear top end by web El on which operating handle 62 is mounted for pivotal horizontal movement by boit 63. Suitable means is provided for moving slide Bit inwardly by gradual progression which preferably comprises cam surface S4 formed on the inside of operating handle E2 at its pivoted end, where it is caused to engage the end of slide tli, to move it inwardly, as the operator pulls handle E52 toward him. But it will be understood that other suitable means `may be provided for this purpose, if desired. A pin 68 connected to the underside of slide 58 has connected to it one end of coil spring 69 and pin 'IG (Fig. 2) mounted on the inside edge of web 6I has the other end of coil spring 59 connected to it. It will be understood from this construction that as the operator pulls handle 62 toward him it advances slide 58 carrying the second forming roll Si] with it to bend or roll in the top edge 'il of the die lll as the die 'lli is gripped and advanced between the two knurled gripping rolls 25 and '50. .es the operator releases operating handle 62, coil spring 5e pulls slide 5t rearwardly and with it pulls forming roll 6c out of bending engagement with the top edge 'lI of die piece 1t.

The operation of our machine is as follows:

The die 'ill is heated to red or white heat in a forge or electric furnace and it is then placed with its top edge 'FI upwardly on horizontal bed i2 around knurled gripping roll 25. The operator then starts the machine by turning on the electric motor (not shown) which through sprocket chain IE5 and sprocket wheel IS turns shaft Il, bevel gear i8 which motion in turn is transmitted through bevel gear I9, vertical shaft 2Q, gear 22. Gear 22 in turn rotates gear 23 mounted on vertical shaft 2t carrying knurled gripping roll and forming roll 26. With these parts in motion, the operator then steps` on the foot pedal .'li to move it to its forward position and thus actuates hydraulic cylinder 3S to move arm 35 outwardly and through lever til to move movable bed I2c inwardly. Slide |20l through bracket lid carries gear i? into mesh with gear 22 thus transmitting rotary motion through gear it to vertical shaft it carrying the second knurled gripping roll The gripping rolls 2t and il@ thus grip the die le between them and cause die it to traverse or rotate between the two gripping rolls. As die iii advances through the gripping rolls, the operator pulls the operating handle 62 toward him causing forming roll et to press against the top edge of the die 'lil and thus press it between forming rolls 69 and 26, to roll in the top edge about l-lgth of an inch. In Figs. Ll and 5 the slight bend given to the die 'is is shown at 'Il in Fig. 5, and is again shown in the sectional View of the die 'l in Fig. 2. The die 'f is preferably traversed or advanced through the forming rolls 26 and Sil several times, the operator increasing the pressure placed on the top edge l'I of the die it by pulling the operating handle toward him gradually, until the desired bend for the roll-in is secured. If the die "IQ has been properly heated two or three passes through the forming rolls is sufficient.

It will thus be seen, that by means of our machine, the rolling-in process can be performed in two minutes or less after the top edge of the die has been properly heated-an operation, which by hand forging has previously required 1/2 t0 /i hour labor. Great savings can thus be made in the cost of making walker dies, by the use of our machine.

We claim:

l. In a machine for bending and forming metal stock, and combination7 a suitable frame, a ho 'rental bed on said frame to support the metal stock, s bed having a separate, laterally movable section, a pair of gripping rolls extending above the surface of said bed for moving the metal stock between them, power means for posi-- tively driving one of said gripping rolls, the other being mounted on the movable section of said bed and movable laterally with respect to said gripping roll, means controlled by the operator for laterally moving the second of said gripping rolls into and out of gripping relation with said nrst gripping roll, and for drivingly connecting said second gripping roll to the power means, a. pair of forming rolls extending above the surface of said bed, the first forming roll being positioned on said first gripping roll and the second being mounted on a movable section of said bed above said second gripping roll, and a hand-operated handle for moving said second forming roll into and out of forming relation with respect to said metal stock when positioned between said rolls.

2. In a machine for bending and forming metal stock, and in combination, a suitable frame, a at horizontal bed on said frame to support the metal stock, said bed having a separate laterally movable section, a pair of forming rolls for forming the metal stock, a pair of gripping rolls for moving the metal stock between them, one of said forming rolls and one of said gripping rolls being carried on the separately movable section oi said bed, power means for driving one of said gripping rolls, means controlled by the operator for laterally moving the separately movable section 0f said bed and the gripping roll carried thereon into and out of gripping relation with the first gripping roll and the metal stock positioned between them, and mechanism controlled by the operator for moving the forming roll carried on the separately movable section of said bed into and out of forming relation with respect to the metal stock when positioned between said rolls.

3. In a machine for bending and forming metal stock, and in combination, a suitable frame, a Iiat horizontal bed on said frame to support the metal stock, said bed having a separate laterally movable section, a pair of forming rolls for forming the metal stock, a pair of gripping rolls for moving the metal stock between them, one of said forming rolls and one of said gripping rolls being carried on the separately movable section of said bed, power means for driving one of said gripping rolls, means controlled by the operator for laterally moving the separately movable section of said bed and the gripping roll carried thereon into and out of gripping relation with the rst gripping roll and the metal stock positioned between them, and a hand-operated handle mounted on said separately movable section of said bed for moving the forming roll carried thereon into and out of forming relation with respect to the metal stock when positioned between said rolls.

4. In a machine for bending and forming metal stock and in combination, a suitable frame, a iiat horizontal bed on said frame to support the metal stock, said bed having a separate, laterally movable section, a pair of forming rolls for forming the metal stock, a pair of gripping rolls for moving the metal stock into the bight of the forming rolls, said forming rolls and gripping rolls extending vertically above the surface of said bed, and one of said forming rolls and one of said gripping rolls being carried on the separately movable section of said bed, power means for driving at least one of said gripping rolls, means controlled by the operator for moving the separately movable section of said bed to carry the gripping roll thereon into and out of gripping relation with the rst gripping roll and the metal stock positioned between them, and mechanism controlled by the operator for moving the forming roll carried on the separately movable section of said bed into and out of the forming relation with respect to the metal stock when positioned between said rolls.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 283,924 Root Aug. 28, 1883 373,777 Kirby Nov. 22, 1887 565,535 Doxford Aug. 11, 1896 2,223,472 Whitten Dec. 3, 1940 2,357,793 Clark Sep-t. 12, 1944 2,471,445 Nicholas May 31, 1949 FOREIGN PATENTS Number Country Date 20,189 Great Britain of 1892 

